university law professor. likely to make at least one appointment in his second term. for justices, they are in their 70s, justice ginsburg with to po tenial she could retire being she is 79 years old. who would be the key, you think, to being replaced first, though? >> yeah. so i don't think that we can go solely on the ages because the ages are only a weak proxy. marty ginsburg, justice gips burg's late husband, how frail is a justice, she can do 25 push-ups, how many can you do? she wants to stay on at least as long as her hero, justin brandeis, a few years from now. >> who would be the next logical person looking to get off the bench? >> the next person who might get off the bench, it could be scalia, kennedy. i think they'll be hanging on with their fingernails to wait out this administration. and justice breyer, of course, is 74. so you have two people who are 76 and 74 underneath that. >> appointing a justice to the supreme court has always been seen as a history-changing moment for any president to do so. but in this case, does the president care wholeheartedly about changi
